Gordon, Mackenzie  1913- <br/><br/>
Early Pennsylvanian ammonoids from southern Nevada / 
by Mackenzie Gordon. 
 -- Washington :   United States Government Printing Office,   1969 
 - 11 p. -- 
 (Geological Survey Professional Paper  ;  613-C).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Amonites<br/>Nevada
<br/><br/><label>Universal Decimal Class. No.: </label>564.53(793)